CAJ | 학술논문

为了更好地了解勾形磁场对分离结晶法制备 CdZnTe 晶体过程中熔体热毛细对流的影响,采用有限差分法对熔体内的热量和动量传递进行数值模拟.假定熔体为不可压缩牛顿流体,熔体的高径比为1,狭缝自由表面无因次宽度为0．1,研究了不同 Ma 数下,Ha 数分别为0、45、90、135时的 CdZnTe 晶体生长过程.结果表明,勾形磁场能够有效地抑制熔体内部的对流,并且随着磁场强度的增加,抑制作用增强,熔体内部流动减弱.
위료경호지료해구형자장대분리결정법제비 CdZnTe 정체과정중용체열모세대류적영향,채용유한차분법대용체내적열량화동량전체진행수치모의.가정용체위불가압축우돈류체,용체적고경비위1,협봉자유표면무인차관도위0．1,연구료불동 Ma 수하,Ha 수분별위0、45、90、135시적 CdZnTe 정체생장과정.결과표명,구형자장능구유효지억제용체내부적대류,병차수착자장강도적증가,억제작용증강,용체내부류동감약.
A numerical study about heat and momentum transfers in the melt was proformed to clarify the effect of cusp magnetic field on the melt thermocapillary convection in detached solidification by the method of the fi-nite-difference method.During the calculation the melt was considered to be an incompressible Newtonian fluid, the ratio of height and radius and the width of gap were 1 and 0.1,respectively.The process of crystal growth was simulated for Ha = 0,45,90 and 135 under different Ma numbers.The results indicated that the cusp magnetic field can effectively suppress the flow in the melt,and the inhibition effect was enhanced with the in-crease of magnetic field strength.